#applicationlayer

[techwithravish]

Boost Your IT Career with Expert Notes – Now Available on Tech With Ravish!

Are you preparing for CCNA, AZ-104, AZ-900, or BGP and looking for high-quality, exam-focused notes? Look no further! At Tech With Ravish, we’ve created concise, practical, and up-to-date notes designed to help you master key concepts and pass your certification exams with confidence.

✨ Why Choose Our Notes?

✅ Simplified Explanations: Each topic is broken down in easy-to-understand language, perfect for beginners and intermediate learners. ✅ Exam-Oriented Content: Focused on the latest exam objectives and frequently asked questions. ✅ Diagrams & Packet Flow: Visual explanations and flowcharts to help with real-world understanding. ✅ Instant Download: Get access immediately after purchase. ✅ Trusted by Thousands: Used by students and professionals across India to crack top certifications.

📦 Available Notes:

🔹 CCNA (Cisco Certified Network Associate) Covers all major topics like IP addressing, switching, routing, OSPF, VLANs, NAT, ACLs, and more.

🔹 AZ-104 (Microsoft Azure Administrator) Comprehensive Azure notes including VMs, storage, networking, RBAC, and monitoring.

🔹 AZ-900 (Microsoft Azure Fundamentals) Perfect for beginners in cloud computing – covers cloud concepts, Azure core services, pricing, and governance.

🔹 BGP (Border Gateway Protocol) Advanced networking notes for ENARSI and real-world BGP implementations – ideal for serious network engineers.

💻 How to Buy?

Visit 👉 TechWithRavish.com Browse the Notes Section and pick your course. Make secure payment and get instant download access.

📺 Learn Along With Us

Subscribe to our YouTube channel for free tutorials and exam guidance: 👉 Tech With Ravish on YouTube

🎯 Start Your Certification Journey Today!

Whether you're a student, job seeker, or a working IT professional, our notes will save your time and help you revise smarter. Don’t just study hard — study smart with Tech With Ravish.

[smartcherryposts]

TCP IP Reference Model

TCP IP Reference Model - Whenever A Computer Wants To Communicate With Another Computer, The Communication Between Those Two Computer's Should Be Good And Reliable.So We Can Guarantee That The Data Is Received Correctly.

For Example When You Want To View A Web Page Or Download A File Or Look At Email You Would Expect The Web Page Intact In Order With Nothing Missing.

Or If You Download A File,You Would Want Entire File To Be Downloaded With Missing Data In It.

This Is Where TCP Comes In. TCP Stands For Transmission Control Protocol And This Is One Of Main Protocols Used In TCP IP Network.

TCP Is Guarantee That All The Data Is Received And In Order. Because Without TCP There Some Of The Data Could Be Missing Or Out Of Order. Because If You View A Web page Without TCP Your Web Page Could Be All Messed Up.The Images Could Be Missing Or The Text Could Be Backwards And Out Of Order. Or If You Download A File, You Might Not Get The Entire File Or You Could Get A File Out Of Order Which Would Render The File Useless. So This Is Where TCP Comes In. TCP Is A Connection Oriented Protocol Which Basically Means  That It Must First Acknowledge A Session Between A Two Computers They Are Communicating. So The Two Computers Verify A Connection Before Any Communication Takes Place And It Does By Using A Three Way Hand Shake. So The First Step A Computer Will Send Message Called SYN. Then The Receiving Computer Send Back An Acknowledgement Message Telling The Sender That They Has Received The Message. And The Finally The Sender Computer Sends An Acknowledgement Message Back To The Receiver Computer.

    Once This Has Taken Place Data Can Be Delivered.   And Another Important Thing To Remember About TCP Is That It Guarantees The Delivery Of The Data. So If The Data Packet Goes Straight And Doesn't Arrive Then TCP Will Resent It.  

IP Address (Internet Protocol Address)

Internet Protocol Address Is a Numerical Label Assigned To A Each Device(Computer Etc) Connected To Computer Network That Uses The Internet Protocol For Communication. An IP Address Sever Two Principle Functions : Host Or Network Interface Identification And Location Addressing. If You Understood Please Subscribe To My YouTube Channel And Share With Your Friends.   Smart CSE..!         Read the full article